It's been 54 years since the Beatles stopped making music. That late 60s early 70s period would probably qualify as the renaissance period of adult rock and roll. Young people today who are exposed to the Beatles, Rolling Stones, Zeppelin, the Who and others often regard one of them as among their favorite bands--usually Beatles or Zep
I listen to music every day and buy a significant amount of current fare. I admire and listen to countless new stuff- Taylor ( very good although the lyrics are usually directed toward female sensibilities), Chappel Roan, Killers, 21 Pilots, Billie Eilish to name a few as well as new country and Americana (too numerous to mention). I enjoy a lot of current music, but I do not believe the vast majority will be something that be listened to 50 years from now. I'm not talking about a song here or there--I'm talking about an artist.
So, despite the fact that every generation has its own music, I do think that as a rule, the music of the late 60s - early 70s is "better", that is, appeals to a wider array of people and generations than the music of today.